{"title":"评估用于粗网格 RANS 模拟的壁模型","authors":"","doi":"10.1016/j.anucene.2024.110807","DOIUrl":null,"url":null,"abstract":"<div><p>In the present article, the applicability and accuracy of different boundary conditions for the simulation of turbulent, single-phase flows with heat transfer were assessed within the context of coarse-mesh CFD simulations for engineering applications. Standard wall functions for relevant turbulent quantities were extended to include geometry-dependent effects and implemented as boundary conditions for existing OpenFOAM solvers, along with a set of coarse-mesh wall models based on empirical correlations. The different models were tested in the simulation of numerical experiments where high-fidelity simulations can be provided and, in general, results show that the application of the new set of boundary conditions produces a satisfactory prediction of the streamwise velocity and temperature in the evaluated conditions, even when the first cell center is far from the wall. The analyzed extensions and corrections produce a better balance between accuracy and computational speed for coarse discretization, compared to traditional wall treatments.</p></div>","PeriodicalId":8006,"journal":{"name":"Annals of Nuclear Energy","volume":null,"pages":null},"PeriodicalIF":1.9000,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0306454924004705/pdfft?md5=146313a1aed519d402e73059b51f9088&pid=1-s2.0-S0306454924004705-main.pdf","citationCount":"0","resultStr":"{\"title\":\"Assessment of wall models for coarse-mesh RANS simulations\",\"authors\":\"\",\"doi\":\"10.1016/j.anucene.2024.110807\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>In the present article, the applicability and accuracy of different boundary conditions for the simulation of turbulent, single-phase flows with heat transfer were assessed within the context of coarse-mesh CFD simulations for engineering applications. Standard wall functions for relevant turbulent quantities were extended to include geometry-dependent effects and implemented as boundary conditions for existing OpenFOAM solvers, along with a set of coarse-mesh wall models based on empirical correlations. The different models were tested in the simulation of numerical experiments where high-fidelity simulations can be provided and, in general, results show that the application of the new set of boundary conditions produces a satisfactory prediction of the streamwise velocity and temperature in the evaluated conditions, even when the first cell center is far from the wall. The analyzed extensions and corrections produce a better balance between accuracy and computational speed for coarse discretization, compared to traditional wall treatments.</p></div>\",\"PeriodicalId\":8006,\"journal\":{\"name\":\"Annals of Nuclear Energy\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":1.9000,\"publicationDate\":\"2024-08-05\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.sciencedirect.com/science/article/pii/S0306454924004705/pdfft?md5=146313a1aed519d402e73059b51f9088&pid=1-s2.0-S0306454924004705-main.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Annals of Nuclear Energy\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0306454924004705\",\"RegionNum\":3,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"NUCLEAR SCIENCE & TECHNOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Annals of Nuclear Energy","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0306454924004705","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"NUCLEAR SCIENCE & TECHNOLOGY","Score":null,"Total":0}
Assessment of wall models for coarse-mesh RANS simulations
In the present article, the applicability and accuracy of different boundary conditions for the simulation of turbulent, single-phase flows with heat transfer were assessed within the context of coarse-mesh CFD simulations for engineering applications. Standard wall functions for relevant turbulent quantities were extended to include geometry-dependent effects and implemented as boundary conditions for existing OpenFOAM solvers, along with a set of coarse-mesh wall models based on empirical correlations. The different models were tested in the simulation of numerical experiments where high-fidelity simulations can be provided and, in general, results show that the application of the new set of boundary conditions produces a satisfactory prediction of the streamwise velocity and temperature in the evaluated conditions, even when the first cell center is far from the wall. The analyzed extensions and corrections produce a better balance between accuracy and computational speed for coarse discretization, compared to traditional wall treatments.
期刊介绍:
Annals of Nuclear Energy provides an international medium for the communication of original research, ideas and developments in all areas of the field of nuclear energy science and technology. Its scope embraces nuclear fuel reserves, fuel cycles and cost, materials, processing, system and component technology (fission only), design and optimization, direct conversion of nuclear energy sources, environmental control, reactor physics, heat transfer and fluid dynamics, structural analysis, fuel management, future developments, nuclear fuel and safety, nuclear aerosol, neutron physics, computer technology (both software and hardware), risk assessment, radioactive waste disposal and reactor thermal hydraulics. Papers submitted to Annals need to demonstrate a clear link to nuclear power generation/nuclear engineering. Papers which deal with pure nuclear physics, pure health physics, imaging, or attenuation and shielding properties of concretes and various geological materials are not within the scope of the journal. Also, papers that deal with policy or economics are not within the scope of the journal.